Chem. Senses 25: 103-109,
2000
© Oxford University Press 2000
Alarm Reaction in the Crucian Carp is Mediated by the Medial Bundle of the Medial Olfactory Tract
Division of General Physiology, Department of Biology, PO Box 1051, University of Oslo, N-0316 Oslo 1 Department of Science, Faculty of Mathematics and Sciences, Agder University College, Servicebox 422, N-4604 Kristiansand, Norway
Correspondence to be sent to: Kjell B. Døving, Division of General Physiology, Department of Biology, PO Box 1051, University of Oslo, N-0316 Oslo, Norway. e-mail: kjelld{at}bio.uio.no
Experiments were performed to determine which bundles of the olfactory tracts were essential for mediating alarm reaction in crucian carp (Carassius carassius L.). The fish were maintained in physiological saline after surgery to preserve the remaining tracts and postoperative inspections revealed the functionality of the intact tracts. Operations on the tracts were performed symmetrically on both sides. Sham-operated and non-operated fish showed the typical alarm behaviour of fast swimming to the bottom, dashing movements and aggregation when exposed to skin extract which contain alarm substance. Fish with only the medial bundle of the medial olfactory tract intact also displayed the alarm behaviour upon exposure; however, these fish did not react to the amino acid, L-alanine with either feeding response or alarm reaction. Crucian carp which had the medial bundle of the medial olfactory tract cut, leaving both the lateral bundle of the medial olfactory tract and the lateral olfactory tract intact, did not display any alarm reaction to skin extract; however, these fish reacted to exposure to L-alanine with feeding behaviour. There were statistically significant differences between the behaviour scores for the fish subject to different treatments. The present study demonstrates that the medial bundle of the medial olfactory tract appears to be both necessary and sufficient for mediation of the alarm reaction. The results also show that the sensory neurons which respond to alarm substance terminate and make synaptic connections with the secondary neurons that make up the medial bundle of the medial olfactory tract; thereby demonstrating the specificity of the spatial aspect of olfactory processing. The results are discussed with respect to the spatial aspect of organization within the olfactory system, the pattern of generalization across orders of fish, and the functional implications of the spatial arrangement of information transmission between the peripheral olfactory organ and the brain.
CiteULike 
Connotea 
Del.icio.us What's this?
This article has been cited by other articles:
|
|
 |
|
  S. Lastein, E. H. Hamdani, and K. B. Doving Single unit responses to skin odorants from conspecifics and heterospecifics in the olfactory bulb of crucian carp Carassius carassius J. Exp. Biol., November 15, 2008; 211(22): 3529 - 3535. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 S. H. Rolen and J. Caprio Processing of Bile Salt Odor Information by Single Olfactory Bulb Neurons in the Channel Catfish J Neurophysiol, June 1, 2007; 97(6): 4058 - 4068. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 S. Lastein, E. H. Hamdani, and K. B. Doving Gender Distinction in Neural Discrimination of Sex Pheromones in the Olfactory Bulb of Crucian Carp, Carassius carassius Chem Senses, January 1, 2006; 31(1): 69 - 77. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 A. A. Nikonov, T. E. Finger, and J. Caprio Beyond the olfactory bulb: An odotopic map in the forebrain PNAS, December 20, 2005; 102(51): 18688 - 18693. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 Y. Sato, N. Miyasaka, and Y. Yoshihara Mutually Exclusive Glomerular Innervation by Two Distinct Types of Olfactory Sensory Neurons Revealed in Transgenic Zebrafish J. Neurosci., May 18, 2005; 25(20): 4889 - 4897. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
F.-A. Weltzien, E. Hoglund, E. H. Hamdani, and K. B. Doving Does the Lateral Bundle of the Medial Olfactory Tract Mediate Reproductive Behavior in Male Crucian Carp? Chem Senses, May 1, 2003; 28(4): 293 - 300. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
E. H. Hamdani and K. B. Doving Sensitivity and Selectivity of Neurons in the Medial Region of the Olfactory Bulb to Skin Extract from Conspecifics in Crucian Carp, Carassius carassius Chem Senses, March 1, 2003; 28(3): 181 - 189. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
E. H. Hamdani and K. B. Doving The Alarm Reaction in Crucian Carp is Mediated by Olfactory Neurons with Long Dendrites Chem Senses, May 1, 2002; 27(4): 395 - 398. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
E. H. Hamdani, A. Kasumyan, and K. B. Doving Is Feeding Behaviour in Crucian Carp Mediated by the Lateral Olfactory Tract? Chem Senses, November 1, 2001; 26(9): 1133 - 1138. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
E. H. Hamdani, G. Alexander, and K. B. Doving Projection of Sensory Neurons with Microvilli to the Lateral Olfactory Tract Indicates their Participation in Feeding Behaviour in Crucian Carp Chem Senses, November 1, 2001; 26(9): 1139 - 1144. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
A. A. Nikonov and J. Caprio Electrophysiological Evidence for a Chemotopy of Biologically Relevant Odors in the Olfactory Bulb of the Channel Catfish J Neurophysiol, October 1, 2001; 86(4): 1869 - 1876. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
H. P. Zippel, M. Gloger, L. Luthje, S. Nasser, and S. Wilcke Pheromone Discrimination Ability of Olfactory Bulb Mitral and Ruffed Cells in the Goldfish (Carassius auratus) Chem Senses, June 1, 2000; 25(3): 339 - 349. [Abstract] [Full Text] [PDF]
|
|